Chuck for car-wheels



N. S. BOUTON. CHUCK FOR GAR WHEELS.

Patented Sept. 23, 1890.

, ,i %W /M /////4 z 1 w e I! a W X 9 UNITED STATES PATENT OFFICE.

NATHANIEL S. BOUTON, OF CHICAGO, ILLINOIS.

CHUCK FOR CAR-WHEELS.

SPECIFICATION forming part of Letters Patent No. 436,886, datedSeptember 23, 1890.

Application filed May 16, 1890. Serial No. 352,027. (No model.)

.To all whom it may concern:

Be it known that I, NATHANIEL S. BOUTON, of Chicago, in the county ofCook, in the State of Illinois,have invented certain new and usefulImprovements in Chucks for Car-Wheels, of which the following is aspecification.

The object of my invention is to provide a chuck in which a car-wheelmay be automatically centered accurately with reference to the portioncast in the chill, the tread being left unobstructed by the chuck-jaws,however,

. so that it may be ground without. first mounting the wheel on amandrel.

In the accompanying drawings, Figure 1 is a section of a chuck and acar-wheel held therein. Fig. 2 is a section on a larger scale of a partof the rim of a car-wheel and part of the chuck-jaw. Fig. 3 is aperspective of the chuck-jaw removed from the chuck.

A, Fig. 1, is the face plate or body. of the chuck, in which the jaws BB (three or more in number) are fitted to slide in the ordinary manner,each jaw being moved bya screw C. The latter are connected so as torevolve simultaneously by a toothed ring D meshing with apinion, as E,on each screw 0. As oar-wheels are usually made, the chill extends aboutto the middle or greatest diameter of the flange F, as indicated by theline f, (see Fig. 2,) the line of junction of the chilled and unchilledportions of the flange being sharply defined. Sometimes a ring of sandis put in the flange of the chill, so as to make what is known as asand-flange wheel. The ring of sand, being rigidly held in the chill andbeing trued with reference to the rest of the chill-surface, makes theportion of the wheel which is formed by it practically as true as ifcast in a chill without a sand-flange. I therefore include the part ofthe wheel so cast in the chill as, for my purpose, a part of the chilledsurface. The portion of the flange cast in the chill is of course truewith the rest of the chilled face of the wheel, and will serve to centerthe wheel by.

I construct the bearing-face b of the chuck B so as to make contact withthe chilled portion only of the flange and cut away the inner portion ofthe bearing-face, as seen at a, so that the unchilled portion of theflange shall not touch the chuck-j aw. The bearing face 6 of the jaw iscurved to fit a car-wheel of the usual diameter-=2. e, 33 inches-but, tobetter adapt it to car-wheels, both larger and smaller, a portion of thecentral portion of the bearing-face maybe cut away, as seen at c, Fig.3. The inner edges of the bearing-face of the chuck-jaw form aguide-line by which the car-wheel may be set, the edges of the chilledflange-surface being made to coincide therewith. To make this adjustmentI provide a groove in the radial face d of the chuck-jaw, in which awedge G is set. Said wedge comes in contact with the inner portion ofthe wheelfiange, and can be driven in or out, so as tobring the Wheelinto proper position after the jaws have been partly closed thereon. Thejaws being tightened the wheel will be properly set and the tread willbe in position for grinding, and the hub forboring, also, if desired.The wedge G serves to keep the jaw from slipping on theinclined face ofthe flange. The use of the wedge G or any equivalent is not necessary inall cases, as the chilled part of the flange F is not always of such ashape as to prevent the jaw from getting a secure hold thereon withoutthe assistance of the wedge; but in most cases it, or an equivalent-suchas a screw or stiff springwould be needed, unless the chill wereextended farther on the flange than usual.

What I claim, and desire to secure by Letters Patent, is-

1. The combination, in achuck adapted to hold chilled flanged wheels, ofjaws adapted to bear on that part only of the wheel-flange which extendsfrom the tread or face of the wheel to the greatest diameter of theflange, being that portion which is cast in the chill, said jaws beingadapted to center the wheel thereby, and means for operating said jaws,all substantially as described.

2. The combination, in a chuck for wheels, of jaws having a bearingface1), adapted to bear on the chilled portion of the Wheelflange only, anda wedge, as G, in the face of the chuck-jaw, substantially as shown anddescribed.

NATHANIEL S. BOUTON.

Witnesses:

O. R. BARNETT, Tom) MAsoN.

